Wow! Good for you! That's amazing! My Dad was diagnosed last month with Stage 4 Colon Cancer and his surgeon gave him a death sentence. However, he is doing great with the Chemo (on his 3rd treatment today) he is working, gaining weight, and has energy. You are living proof that you can live with this disease. I will be sure to tell my Dad I hae spoken with yet another survivor!
As far as your levels go, I do not know any information to give you a concrete answer, but I assume that your doctor will be monitoring you closely with your fluctuating levels. Don't stress you, leave that part of the job to the doctors and you concentrate on your part of the job---your mind!